Socket for incandescent electric lamps.



J. x. LUX. '80mn ron INUANDESGENT Enno'mo Lure.

I AITLIUATIOI FILED HAY 1U, 1901. 954, 1 1 7.

Patented pr. 5,

.4 TTGHNE yffssfs I 'JULiUs ii. LUX, ois

SYRLCSE, 'NEW YORK, ASSIGNOE. T0 YSS r, SEYjIfiC-UR, NQM

i GF SGLVAY, NEW YORK, A CORPORTN.

eeoiie'r Foti iiieiiiiiziisciinr Erminio LAMPS.

954,11 g Spciiieaiiozi of Leiiers'ieatent.

.ppiication :tiled May 16, 1907. Serial No. 373,337,

.To i1/Z ivi/om 'it ning; ronrf'rn:

Re it linown that l. Ji'niiie K. LUX, :i etixen ot' the lii'iieil'i-`\iiites, residing :it Syracuse, .in the eonnij: ot ,Oiioiitliigrzifind Stute ot New oi'li, have inientel new find i tor liieiinileseentElectric Lunnis. o li whivli the following' in ii specifi" riiiion. i

.My inwiii'ionrelates to snehets tor inminileseenl elet-trie hunne.iiiiil consists of :i new eonsl'i'nciion o'lx iliose parte. whereby thenie- 'tzillie i pini :ire supported :intl protected, ,that is. ol thesheet inet-.il inelosing' ezifie, the insnzitingl innnif thereto:ii'nltlie insulating bese on wliieli the inetnllie parte in CircuitA:life supported.

-- The importent iezitnresi o'l niy invention nre to foi-in the wip withiiiviirflly iii'i'neil lips. unil. the shell with eoi'i'esponilinenini'- -giniil'e'niile grooves toji'egislei' willi Siiitl lips` 4unilwith slots :nliueent lo siiiil inziigni :intl in 'line with sindgi-wvex` lo engage willi sind lips when the shell iS pnelieilsli'iiifi'lit'lionie in the viii). ivliereliy tliiyehell in tirinluifnml positively seenseil to the eiii l iit ili'i'llie easilyilieengzigeil tlieieli'oni 'wl-ien lil'eriii'eil.

'llie Gzip .thingie 'ie also provided willi' zin` inwardly tiirneil lng;to register with the nsnzil 'enliirjl'eil ihiii'iib-pii-ee Slot in thex@hell to in- 30 Sni'e :i eori'evt poe'itioningg ot the Snell when il isto he Sei on the ezip.

the Shell in position n nil :i 4slieeizil vt'oi'ni ot insulating' linni,y i'oi' the een iilso shown.

The upper portion. o l the 'iiisn'liiting` holly or buse is niliiile ofSiniilleiA liiinietei than .the

lower to periiiitezisy assembling' :intl easysepiiriition ot' the.enpiinil' Shell.A

herewith` in whieli the ieteienee'nnnierfils of the. tleSei-iptionindicate the eroi-responding parte in all the tlgures.-

Figure l is ii. :troni elei'iilion of the socket.

with parts broken iiwiiy to show how my in.-.` .vention is applicable toii'ileviee of 'that sort- .4 Fig. G shows my soc-keit4 in elevationineloseil within :i husk Shown in eiilfirgeilseetion.

Fig. 7 is a partial -Seetioii of the .cup iinilv .initiiilly and gniclethem to th Ilots.

ziteiited Apr. 5, 19M?.

is 2i of Fig. 9 is a partial elevationo the oep shell as; shown in Fig.2. ein'. 8 tial cross Section on line Vll VH Yintl shell separated,showingv fi slight modieiition in the arrangement of the lips `amelslots.

In the figures, l inrlientes the chi) having the usual tiinge 2 andthreaded l fishing 3, whereby the ea is secured in position on thelixtiii-e or elsew 1ere.

fl is the Substantially cylindrical shell heviiig eii'iipper marginadopted to be inserted withinl the Gzip fienile whereby the insulatingloch or blocks carrying the parts in circuit are supported sindprotected heilig wired. I

To connect thel cap' to the sliel when the pai-ts are assembled, thecap-Piange is proviileilwith a plurality of smell inwardly tin-ned lips6, :intl the shell with eorr @poneing slots 7 to engage with tlose lips,when the shell ie inserted straight into the cap. rllie viizitni'ail-i'esilienei7 of the shell permit-S 'ilsniiirgin to slip by the lips.and this is -pronioteil 'hy the nini-gine] gniifle-giooves 8 inziiineinent with the Slots to receive the lips The clap is :ilse formedwith ii guide .iig S, corresponding to theelety l0 in the shell for thef thumb-piece '11 of the switch. By this lug `the iirreiig'enient of thetwo parte, when the Sliellis to' he eet, in theenp, is positively indi--eii-ietl. This lng ilse engaoes with the perce` liiin bnie te hollit:iwfiy ron'i the Shell niargina'it that point,A so vthat the margin eenbe presc (lin, wlieii ,-tlie'e:ip and shell :ire'to be Sepn'ilzi ed." i'A sliellisfto Clo. iiw'aywitli the Screws by which the. shell hiisiheretofore been commonly con* neetedj t0 the eii'p, :intl to .providemeans easily, zinil, s otojspezilt, automatically to inike suchconnection, when the shell is 'pushed stra-ight home, without anytwisting or tiirniiig'of tlie-pzi`ifts one on the other.'v

The guide liig'insnresproper iilinen'ient' of the parte.' Preferably,three lips, Slots :incl `rinde.grooves 'are provided, 'which :ire'siitti- -eientor security und prevent rocking ol Athe Shell fon the.4cap. The shell is also easily withdraw-n from tlieeiip by pressing onthe nietail ofthe Shell with the thumb at the left, of the thumb-pieeeslot. to disengiige the Shell from the cap lip at that point, and

this construct-ion of cap and then by slightly rocking the shell. Whenthis socket is used with a husk 13 as shown in Fig. 6, so that the thumbcannot be used, the same disen agement of the shell margin from the capange may be effected by in serting between them some thin object such asa knife or screw-driver. This means for securing the shell to the cap isalso neat and inconspicuous.

To adapt the interior parts of the socket to this particularconstruction of inclosing case, the upper part of the insulating baseshould be made of a smaller diameter than the lower. As here shown thebase is composed of the porcelain blocks 15 and 16 of which the upper isslight-ly less in diameter than the lower. The reason is to afford alittle space for the passage of the lug 9 and also space to permit thepressing in of the upper margin of the shell, when it is to bed1sengaged from the cap; furthermore it' the two blocks were made of thesame diameter tas common heretofore) there might be cases,

where, owing to unavoidable accidental irregularities, ythe upper blockwould overhang the lower at some point, making ditiicult the placing ofthe shell in position.

The insulating lining 18 is positively securedin the shell anddisarrangement there ot avoided by lugs 1t) 19 on each side ot` thethumb-piece slot turned in to engage with the lining. (lorres )endingnotches to receive these lugs may be ormed in the lining. The formationot' the guide grooves 8 by forcing in the inetal at the upper margin ofthe shell also cooperates to retain the insulating lining in position.

A simple and economical construction of fiber lining for the cap isshown. This consists of a ring of fiber 21, split at one point from thecord hole, forming a spiral with overlapping ends. The cap is formedwith a plurality of small projections 22. rl`he spiral ring is easilycompressed to be inserted behind these projections, and. then expanding,is securely retained in place.

26 is the outer lamp terminal surrounded by the insulating bushing Q7. I

In Fig. 2 is shown one ot the two wire terminals 28, to which the wiresare led through the grooves 29 2th The switch and the other metallicparts coni'iecting the respective terminals are arranged between theporcelain blocks.

In all the other figures the slots T are shown arranged in acircun'ifercntial line, and the lips similarly :ii-ranged and on theedge of the cap flange; but in Fig. t), the

li )s 6 are formed on the flange above its e ge, and inclined as shown;the slots T are similarly inclined. This slightly modified constructionis sometimes desirable, as I it permits the disengagement of the shellfrom the cap to be made more easily.

The reason for the inclination of the two slots, remote from thethuinbpiece slot 10, and of the corresponding two lips` is that, in'compressing the uppcr margin ot the shell to separate the parts, thetwo sides of the thumb-piece slot are forcedtoward each other and it isnatural to roclr the shell in that direction, z'. c. toward the thumbpiece slot, first to `withdraw the lipsI o ti, on the opposite side fromthe slots i" T' (instead of compressing the margin to a greater extentandV pulling the shell straight out).

lllhen the shell is so rocked, it will be evident that, it' inclined asshown, the lips G (3 will more easily disengage from their slots.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a device of the charm` ter described in-which the operative partsare inclosed within a sheet metal protective casing, the combination ofa brass cap having a flange, and a brass shell having itsI uiper marginfitting within the cap, said shell being provided with a verticalslotextending down wardly from its upper margin, and with a pluralityot' substantially circumferential short slots, and said cap beingprovided with an inwardly turned guide. lug corresponding to saidvertical slot, and with a plurality of inwardly turned short lipscorresponding to said short slots and adapted to engage therewith, andthereby secure the shell to the cap and retain the operative parts inposition, said margin being comprcssible to permit the engagement ot thelips and the disengagement tliei'col'.

2. ln a key socket for incandescent electric lamps, tlu` combination ofa sheet metalbrass cap, and a tubular brass Ishell having itsresilientuppcr margin adapted to be inserted in the cap` said shellbeing provided with a longitudinal, marginal. front slot for the key ofthe socket switch and with three short transverse slots adjacent to themargin edge. ont` of said short slots being arranged adjacent to thelongitudinal slot` and the other two short, slots at tlic rcar beingslightlyv inclined l'roin a transverse line rcvei'sely to each other andsaid cap being provided with a larger inwardly extending ,lug adapted toengage with the longitudinal slot. and with three shorter inwardlvcxtending lips on the cap flange. said lips corresponding in positionand inclination with said short slots. substantially :es de scribed andIshown.

l. ln a key socket 'for incaiulesccnt. elec4 trie lamps', thecombination willi a snbstzintially cylindrical base ot insulatinginaterial, ot the terminals and connections sccured on said base, a thinmetal cap, a thin metal shell having its resilient upper niar-' ginfitting within the cap, said shell having a longitudinal key slot initsl upper margin, an invardly turned guide lug on the cap to engagewith said slot. and its tip engaging with the smaller upper portion ofthe base, inwardly turned lips on the cap flange and said shell formedwith slots adjacent to its margin to engage with said lips, said basehaving its upper portion slightly less in diameter than its lower topermit the compression of the resilient upper margin and thedisengagement thereby of the lips from the slots.

4. In a Key socket for incandescent electric lamps, the combination withan, inclosing cap and shell, of means toA connect vthe shell to the capwhen the parts are assembled` a thin lining ot' insulating material forthe shell, said shell and lining being formed with a marginal slot forthe socket key, and inwardly turned lugs on the side of said shell slot,said lugs engaging with the lining to hold it in position.

In a socket for incandescent electric lamps, the combination with a capand shell ot' thin metal, an insulating lining for the shell and aninsulating lining for the cap, said cap ulining being formed of acircular, resilient, substantially tlat piece of insulating materialsplit from its center to its margin at one point so as to be compressedand inserted Within the cap and said cap being provided with inwardlyextending projections to engage with said cap lining and maintainit inposition.

6. In a key socket for incandescent electric lamps, the combination witha base, said base being composed of two substantially cylindricalblocks, the upper block being 'less in diameter than the lower, ofterminals and connections on said base. and a thin brass inclosing shellfor said base and the parts thereon, composed of a ianged cap and atubular shell having a resilient upper margin fitting Within the flange,said shell. having a vertical marginal slot for the protruding key, aplurality of short, substantially transverse slots adjacent to themargin, and guide grooves in the margin opposite the transverse slots,said grooves being formed by forcing in the metal at the margin, andbeing of greatest depth atthe margin edge and gradually diminishing indepth toward 'the transverse slots, said cap having inwardly turned,short lips on the iiange corresponding in position around theeircumference with the grooves and the slots, and being adapted toengage initially with the grooves and then enter the slots, and aninwardly turned guide lug adapted to fit thevertical slot on the shelland having its tip adapted to engage the upper block, when the parts areassembled, substantially as' described and shown.

wardly turned guide lug on the cap tittingA said slot and adapted toengage the base, a plurality of engaging means on the cap and shelldetachably to secure the shell to the cap one of said engaging means.being arranged adjacent to theshell slot to facili tate thedisengagement of the parts.

8. In-a socket-for incandescent electric lamps, the combination with asubstantially cylindrical base of insulating material, ot the terminalssecured on said base, a metal fap. a metal inclosing shell for the base,adapted to marginalengagement with the cap, the marginal portion of saidshell being spaced from the base and provided with a slot to facilitatethe compression of the shell margin, a plurality of engaging means onthe cap and shell detachably to secure the shell to the cap, saidengaging means being arranged one adjacent to the shellslot on one sideand a plurality oppnsitely arranged from said slot to facilitate thedisengagement of the shell from the cap. t

9. In a socket for incandescent electric lamps, the combination with asubstantially cylindrical base of insulating material of the terminalssecured on said base, a metal cap. a metal inclosing shell for the baseadapted to marginal engagement with the cap, the

marginal portion of said shell being spaced from the base andprovided'with a slot to facilitate the compression of the shell margin,an inwardly turned guide'lug on the cap fitting said slot and adapted'toengage the base, a plurality of engaging means on the cap and shelldetachably to secure the shell to the cap, said engaging means beingarranged one adjacent to the shell slot. on oney side and a pluralityoppositely arranged from said slot to facilitate the disengagement ofthe shell from the cap.

In testimony whereof I have signed my name to this specification in thepresence otl two subscribing witnesses.

JULIUS K. LUX:

Witnesses J. It. lvlnalwann, M. B. SMITH.

